790
FNCA52 TJSJ 281930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST FRI AUG 28 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-290800-
SOUTHEAST COASTAL PLAINS-
330 PM AST FRI AUG 28 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 50 10 60
TEMP (24H TREND) 76 (-2) 93 (+1) 77 93
RH % (24H TREND) 90 (+7) 49 (-5) 86 50
WIND 20FT/EARLY(MPH) E 14 E 16 E 14 NE 11
WIND 20FT/LATE(MPH) E 11 E 17 NE 10 E 11
MIXING HGT(FT-AGL/MSL) 5510 4290
TRANSPORT WND (MPH) E 20 NE 12
VENT RATE (KT-FT) 93670 42900
DISPERSION 5 5
DSI 4 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-290800-
SOUTHERN HILLS-
330 PM AST FRI AUG 28 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 20 40 10 70
TEMP (24H TREND) 72 (-3) 91 (+3) 73 91
RH % (24H TREND) 98 (+8) 53 (-11) 92 53
WIND 20FT/EARLY(MPH) E 12 E 13 E 13 NE 11
WIND 20FT/LATE(MPH) E 12 E 13 NE 12 E 11
MIXING HGT(FT-AGL/MSL) 5980 3880
TRANSPORT WND (MPH) E 17 NE 14
VENT RATE (KT-FT) 89700 46560
DISPERSION 5 5
DSI 3 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-290800-
NORTH COASTAL PLAINS-
330 PM AST FRI AUG 28 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 30 30 40 60
TEMP (24H TREND) 75 (-3) 93 (+2) 77 91
RH % (24H TREND) 97 (+5) 52 (-12) 93 58
WIND 20FT/EARLY(MPH) E 18 E 14 E 20 NE 17
WIND 20FT/LATE(MPH) E 11 E 21 E 14 NE 23
MIXING HGT(FT-AGL/MSL) 5360 3290
TRANSPORT WND (MPH) E 18 NE 18
VENT RATE (KT-FT) 85760 52640
DISPERSION 5 5
DSI 5 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-290800-
NORTHERN HILLS-
330 PM AST FRI AUG 28 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 10 10 30 60
TEMP (24H TREND) 73 (-1) 91 (+2) 74 90
RH % (24H TREND) 98 (+2) 54 (-13) 96 58
WIND 20FT/EARLY(MPH) E 16 E 13 E 18 NE 16
WIND 20FT/LATE(MPH) E 8 E 19 E 12 NE 17
MIXING HGT(FT-AGL/MSL) 6170 3550
TRANSPORT WND (MPH) E 16 NE 18
VENT RATE (KT-FT) 86380 56800
DISPERSION 5 5
DSI 3 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-290800-
WEST COAST-
330 PM AST FRI AUG 28 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 30 30 20 70
TEMP (24H TREND) 73 (-2) 94 (+1) 74 94
RH % (24H TREND) 97 (+2) 53 (-9) 95 52
WIND 20FT/EARLY(MPH) E 12 E 13 E 13 NE 17
WIND 20FT/LATE(MPH) E 8 E 14 NE 14 NE 18
MIXING HGT(FT-AGL/MSL) 4530 3820
TRANSPORT WND (MPH) E 12 NE 15
VENT RATE (KT-FT) 45300 49660
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-290800-
EASTERN INTERIOR-
330 PM AST FRI AUG 28 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 40 40 80
TEMP (24H TREND) 74 (-3) 92 (+3) 74 91
RH % (24H TREND) 98 (+7) 53 (-10) 91 57
WIND 20FT/EARLY(MPH) E 13 E 13 E 13 NE 16
WIND 20FT/LATE(MPH) E 14 E 13 NE 13 E 25
MIXING HGT(FT-AGL/MSL) 6420 3900
TRANSPORT WND (MPH) E 18 NE 15
VENT RATE (KT-FT) 102720 50700
DISPERSION 5 5
DSI 4 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-290800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST FRI AUG 28 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS TSTMS
CHANCE PRECIP (%) 40 40 40 80
TEMP (24H TREND) 71 (-3) 88 (+5) 72 87
RH % (24H TREND) 100 (+6) 61 (-11) 96 64
WIND 20FT/EARLY(MPH) E 11 E 12 E 11 NE 11
WIND 20FT/LATE(MPH) E 11 E 12 NE 10 E 20
MIXING HGT(FT-AGL/MSL) 4580 3060
TRANSPORT WND (MPH) E 20 NE 10
VENT RATE (KT-FT) 77860 27540
DISPERSION 5 5
DSI 6 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-290800-
CENTRAL MOUNTAIN RANGE-
330 PM AST FRI AUG 28 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 10 20 20 70
TEMP (24H TREND) 69 (-3) 89 (+5) 70 89
RH % (24H TREND) 99 (+3) 54 (-18) 95 58
WIND 20FT/EARLY(MPH) E 10 E 10 E 11 NE 16
WIND 20FT/LATE(MPH) E 6 E 12 NE 11 NE 17
MIXING HGT(FT-AGL/MSL) 7240 3830
TRANSPORT WND (MPH) E 13 NE 16
VENT RATE (KT-FT) 79640 53620
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-290800-
CAYEY MOUNTAIN RANGE-
330 PM AST FRI AUG 28 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 40 50 30 70
TEMP (24H TREND) 72 (-2) 87 (+2) 72 88
RH % (24H TREND) 100 (+5) 59 (-8) 94 59
WIND 20FT/EARLY(MPH) E 11 E 12 E 11 NE 10
WIND 20FT/LATE(MPH) E 10 E 12 NE 9 E 11
MIXING HGT(FT-AGL/MSL) 5570 3870
TRANSPORT WND (MPH) E 20 NE 14
VENT RATE (KT-FT) 94690 46440
DISPERSION 5 5
DSI 5 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-290800-
VIEQUES-
330 PM AST FRI AUG 28 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS TSTMS
CHANCE PRECIP (%) 50 40 50 80
TEMP (24H TREND) 80 (-1) 92 (+2) 80 91
RH % (24H TREND) 86 (+5) 55 (-6) 84 60
WIND 20FT/EARLY(MPH) E 17 E 17 E 17 NE 18
WIND 20FT/LATE(MPH) E 18 E 16 NE 17 E 25
MIXING HGT(FT-AGL/MSL) 3590 2550
TRANSPORT WND (MPH) E 22 NE 22
VENT RATE (KT-FT) 68210 48450
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-290800-
CULEBRA-
330 PM AST FRI AUG 28 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS TSTMS
CHANCE PRECIP (%) 50 30 50 80
TEMP (24H TREND) 80 (-2) 92 (+2) 81 92
RH % (24H TREND) 90 (+6) 55 (-11) 84 60
WIND 20FT/EARLY(MPH) E 17 E 17 E 17 NE 19
WIND 20FT/LATE(MPH) E 17 E 16 NE 18 E 25
MIXING HGT(FT-AGL/MSL) 3530 2600
TRANSPORT WND (MPH) E 22 NE 24
VENT RATE (KT-FT) 67070 54600
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-290800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST FRI AUG 28 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 0 10 0 80
TEMP (24H TREND) 76 (-1) 94 (+2) 76 94
RH % (24H TREND) 86 (+1) 52 (-3) 89 49
WIND 20FT/EARLY(MPH) E 17 E 19 E 14 NE 17
WIND 20FT/LATE(MPH) E 11 SE 20 NE 16 E 18
MIXING HGT(FT-AGL/MSL) 5070 3720
TRANSPORT WND (MPH) E 20 E 8
VENT RATE (KT-FT) 86190 26040
DISPERSION 5 5
DSI 4 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-290800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST FRI AUG 28 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY MCLEAR PCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS TSTMS
CHANCE PRECIP (%) 50 10 50 70
TEMP (24H TREND) 79 (-2) 90 (+2) 79 89
RH % (24H TREND) 92 (+8) 57 (-9) 88 64
WIND 20FT/EARLY(MPH) E 18 E 18 NE 18 NE 19
WIND 20FT/LATE(MPH) E 18 E 16 NE 19 E 25
MIXING HGT(FT-AGL/MSL) 3400 2660
TRANSPORT WND (MPH) E 23 E 20
VENT RATE (KT-FT) 68000 45220
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-290800-
ST CROIX-
330 PM AST FRI AUG 28 2026
TONIGHT SAT SAT NIGHT SUN
CLOUD COVER PCLDY MCLEAR PCLDY MCLDY
PRECIP TYPE SHOWERS NONE TSTMS TSTMS
CHANCE PRECIP (%) 50 0 50 70
TEMP (24H TREND) 80 (-1) 91 (+2) 80 90
RH % (24H TREND) 90 (+5) 57 (-9) 85 63
WIND 20FT/EARLY(MPH) E 17 E 17 NE 17 NE 14
WIND 20FT/LATE(MPH) E 18 E 17 NE 17 SE 18
MIXING HGT(FT-AGL/MSL) 4650 3770
TRANSPORT WND (MPH) E 21 SE 14
VENT RATE (KT-FT) 83700 45240
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
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